To/From Insensitive Regex Operations

[masq]

Just a small utility I personally find useful. I sometimes deal with regexes that can't use flags such as /i or \c to make them case-insensitive, so I often need to transform them to regexes that are case-insensitive, and doing so by hand is tedious and awful. Usually I'm working with a regex that is a fairly straightforward string though... for example,

Case-sensitive:

Mozilla/[0-9].[0-9] .*

Case-insensitive:

[mM][oO][zZ][iI][lL][lL][aA]/[0-9].[0-9] .*

I haven't really needed to work with crazier regexes, so it might be a kinda fragile operation, but it gets the job done for my purposes, hoping others get use out of it too. Suggestions welcome!